I feel like a major selling point of Nix is "solving the Python dependency-hell problem" (as well as that of pretty much every other stack)

I've seen so many issues with different Python venvs from different Python project directories stepping on each others' dependencies somehow (probably because there are some global ones) that the fact that I can now just stick a basic and barely-modified-per-project Python flake.nix file in each one and be always guaranteed to have the entirely of the same dependencies available when I run it 6 months later is a win.